Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultrahigh heat conduction graphite film and preparation method thereof
The invention discloses an ultrahigh heat conduction graphite film and a preparation method thereof, and belongs to the technical field of heat conduction materials. The preparation method of the ultrahigh heat conduction graphite film comprises the following steps: (1) putting a polyimide film into a high-temperature furnace for pyrolysis treatment; (2) carrying out carbonization treatment on the polyimide film subjected to pyrolysis treatment; (3) heating the carbonized polyimide film to 2000 DEG C under the protection of inert gas, keeping the temperature, continuously heating to 2800-3000 DEG C, completing graphitization treatment, and naturally cooling to obtain a carbon foam film; and (4) calendering the carbon foam film by a calender to obtain the ultrahigh heat conduction graphite film. According to the method, the heating rate of the graphitization key section and growth, development, stacking and orientation of the highest-temperature graphite microcrystals in the heat treatment process are adjusted, the interlayer arrangement regularity is improved through appropriate calendering parameters, it is guaranteed that sheet layers are compact and flat, defects are few, and the graphite film finished product with the ultrahigh heat conductivity coefficient is prepared.
本发明公开了一种超高导热石墨膜及其制备方法，属于导热材料技术领域。超高导热石墨膜的制备方法包括以下步骤：(1)将聚酰亚胺薄膜放入高温炉中进行热解处理；(2)将热解处理后的聚酰亚胺薄膜进行碳化处理；(3)将碳化处理后的聚酰亚胺薄膜在惰性气体的保护下升温至2000℃，保温，继续升温至2800‑3000℃，完成石墨化处理，自然降温冷却，得到碳泡沫膜；(4)将碳泡沫膜经压延机压延即得超高导热石墨膜。本发明中通过调整石墨化关键段升温速率及最高温石墨微晶在热处理过程中的生长、发育、堆叠和取向，并通过合适的压延参数提高层间排列整齐性，保证片层紧密平整、缺陷少，制备超高导热系数的石墨膜成品。
Ultrahigh heat conduction graphite film and preparation method thereof
The invention discloses an ultrahigh heat conduction graphite film and a preparation method thereof, and belongs to the technical field of heat conduction materials. The preparation method of the ultrahigh heat conduction graphite film comprises the following steps: (1) putting a polyimide film into a high-temperature furnace for pyrolysis treatment; (2) carrying out carbonization treatment on the polyimide film subjected to pyrolysis treatment; (3) heating the carbonized polyimide film to 2000 DEG C under the protection of inert gas, keeping the temperature, continuously heating to 2800-3000 DEG C, completing graphitization treatment, and naturally cooling to obtain a carbon foam film; and (4) calendering the carbon foam film by a calender to obtain the ultrahigh heat conduction graphite film. According to the method, the heating rate of the graphitization key section and growth, development, stacking and orientation of the highest-temperature graphite microcrystals in the heat treatment process are adjusted, the interlayer arrangement regularity is improved through appropriate calendering parameters, it is guaranteed that sheet layers are compact and flat, defects are few, and the graphite film finished product with the ultrahigh heat conductivity coefficient is prepared.
本发明公开了一种超高导热石墨膜及其制备方法，属于导热材料技术领域。超高导热石墨膜的制备方法包括以下步骤：(1)将聚酰亚胺薄膜放入高温炉中进行热解处理；(2)将热解处理后的聚酰亚胺薄膜进行碳化处理；(3)将碳化处理后的聚酰亚胺薄膜在惰性气体的保护下升温至2000℃，保温，继续升温至2800‑3000℃，完成石墨化处理，自然降温冷却，得到碳泡沫膜；(4)将碳泡沫膜经压延机压延即得超高导热石墨膜。本发明中通过调整石墨化关键段升温速率及最高温石墨微晶在热处理过程中的生长、发育、堆叠和取向，并通过合适的压延参数提高层间排列整齐性，保证片层紧密平整、缺陷少，制备超高导热系数的石墨膜成品。
Ultrahigh heat conduction graphite film and preparation method thereof
一种超高导热石墨膜及其制备方法
GUO ZHIJUN (Autor:in) / ZHU YAN (Autor:in) / WU JIANXIANG (Autor:in) / YANG LANHE (Autor:in) / HUANG GUOWEI (Autor:in) / CHEN RENZHENG (Autor:in)
23.07.2024
Patent
Elektronische Ressource
Chinesisch
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